Polishing-machine.



PATENTED MAR. 14, 1905 J. SHAVER. POLISHING MACHINE. APPLICATION FILED FEB.15. 1904.

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WITNESSES A TTORNE Y5,

PATENTED- MAR. 14, 1905.

J. SHAVER.

POLISHING MACHINE.

APPLICATION FILED FEB. 15. 1904.

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' A TTORNE YS NrrED STATES Patented March 14, 1905.

PATENT OFFICE.

POLISHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 785,024, dated March 14, 1905.

Application filed February 15, 1904:. Serial No. 193,493-

To all whom it may concern.-

Be it known that I, J OSEPH SHAVER, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have in vented new and useful Improvements in Polishing-Machines, of which the following is a specification.

The object of my invention is to provide a portable device for polishing hard surfaces; and it pertains more especially to that class of devices adapted to be used for polishing marble floors, marble slabs, and other similar surfaces.

The construction of my invention is explained by reference to the accompanying drawings, in which Figure 1 represents a side view thereof as adjusted and adapted to be used for polishing surfaces elevated above the floor. Fig. 2 represents a top view of the device shown in Fig. 1. Fig. 3. represents a top view of the motorinclosing case with the cover and the parts connected therewith removed. Fig. 4 represents a bottom view of the cover of the motorinclosing case showing one of the motor-cylinders in counectlon with the other operating mechanism, the other cylinder'being removed.

Fig. 5 represents a top view of one of the motor-cylinders removed from the motor-inclosing case. Fig.,6 represents a side view of my polishing-machine as adjusted and adapted to be used for smoothing floors in connection. with a supporting-truck, and Fig. 7 represents an end view of the device as shown in Fig. 6.

Like parts are identified by the same reference characters throughout the several views.

1 represents the motor-inclosing case.

2 is the cover of the motor-inclosing case.

The motor is substantially of ordinary construction, and it comprises two cylinders 3 and 4:, each of which is provided with ordinary pistons(not shown) and piston-rods 6 6, which piston-rods are pivotally connected with the crank 5 by a crank-pin 5'. The crank 5 is supported from a vertical shaft 7, from which shaft motion is communicated to the polishing-wheel 8 through the gear-wheels 9 and 10, (indicated by dotted lines,) shaft 11, and universal couplingjoint 12, whereby as said motor is operated a rotary movement is communicated therefrom to the polishing-wheel 8, which is adjusted to rest upon the surface to be polished.

It will be understood that when the cylinder 3 is in place in contact with the contiguous bearing-plate 13 the contact bearingsurfaces 1 1 ll will be brought to bear against such plate 13, when the ports 15 15, which communicate with the respective ends of the cylinder 3, will be caused to alternately register with the ports 16 16 in the bearingplate 13 as said cylinder 3 oscillates upon the supporting-trunnion 17. The supporting-trunnion 17 has journaled bearings 18 in the plate 13. The cylinder 4 is constructed in substantially the same manner as the cylinder 3, and both of said cylinders are retained in contact with the plates 13 above them by the resilient bar 19. Thus it will be understood that as the crank 5 revolves around its central shaft 7 said cylinders 3 and 4: will be caused to oscillate upon their respective supporting-trunnions, whereby the admission of the power medium through the ports 15 and 16 will be controlled and the power medium be alternately led to the respectiveends of the respective cylinders with each revolution of said crank.

It will be understood that in assembling the parts shown in Figs. 3, 4, and 5 the cylinder 3 is inverted and placed upon the plate 13 when the trunnion 17 enters the aperture 18 in said plate. and said cylinder is retained in place against said plate by the bar 19, which is pivotally connected with the side of the cylinder by a trunnion like that shown at 20 on the right in Fig. 4, both cylinders being connected with said bar 19 in like manner.

When the cap 2, together with the cylinders, is inverted and placed upon the motor-case 1, the cap and case are secured together by bolts in the ordinary manner. It will be under shown) through the duct 22, which is preferably made flexible,and the vertical duct 23. 24: is an air-controlling valve. The valve 24 being open, the air is led to the inlet-ports 15 of the respective cylinders 3 and 4 through the ducts 25 (indicated by dotted lines in Fig. 2) and from thence through the ports 16, (shown in Fig. 1,) both cylinders being provided with similar ports and ducts. The ducts 25 are formed. in the elevated portions 26 26 of the cap or cover 2. When the compressed air has done its work in the cylinders, it exhausts through the ports 15, through which it has previously entered,and recess 27,formed in the plate 13,into the motor-inclosing-case 1, when it passes from thence out into the room through the ports 28.

While the motor thus described is especially adapted to be used with my polishing mechanism, I do not wish to confine or limit myself to the construction of motor shown.

The motor-inclosing case 1,together with the polishing-wheel 8 and cooperating'parts, is pivotally supported from the stand 29,which comprises a plurality of supporting-legs 30 and central standard 31, said motor-inclosing case being connected with said standard through the horizontally-arranged bar 32 and bar-supporting collar 33. The bar-supporting collar is adjustably supported from the standard 31 upon the adjustable collar 3 1. The

collar 33 and parts supported therefrom are free to turn in all directions upon said standard 31, while the bar 32 is adjustably. supported from the side of said collar 33 between the bracket-arms 3 1' and the bar-retaining keeper 35. The keeper 35 is preferably provided with anantifriction-roller 36. upon which the supporting-bar 32 rests. Thus it is obvious that by this arrangement the motor, with the polishing-wheel 8,rests upon the sur-. face which is being polished. The motor,with the polishing-wheel, may be adjusted at different elevations above the floor, as may be required, by changing the adjustment of the collar 3 1 upon the shaft 31, said collar 34 being locked at any desired point of adjustment by the hand-screw 37.

38 .is an adjustable handle by which the motor and the polishing wheel are moved backwardly and forwardly in all directions over the surface to be polished at the will of the operator, while the universal joint 12 permits the polishing-wheel 8 to adjust itself to the surface upon which it rests.

When my device is used for polishing floors, the motor and the polishing-wheel are preferably supported upon a truck comprising the axle 39 and axle-supporting wheels 10, said truck serving the purpose and functions of the stand 29 (shown in Fig. 1) when two standards 31 are supported from the axle 39 through the adjustable cross-bar 32. It will be obvious that by this form of construction the polishing-wheel 8, together with the motor and other cooperating parts, may be moved to any and all parts of the room, together with the truck by which it is supported, when power medium is led to the motor, as heretofore described, through the hose 22, when, owing to the fact that the truck is free to move with the polishing-wheel and motor,the slidable bar 32 (shown in Fig. 1) may be dispensed with.

In the form shown in Figs. 6 and 7 the operating-handle 38 is fulcrumed to the standards 31' on a transversely-arranged bar 32, whereby the operator may by hearing down on the end of the handle raise the polishingwheel 8 from the surface of the floor as may be desired when moving the polishing device from one part of a room to another and whereby the operator may also, by raising upwardly upon the handles, apply the polishing-wheel to the surface with greater or less pressure, as desired or as circumstances may require.

42 is a lubricator-cup which is connected with the air-inlet duct 23. The lower end of the cup 42 is provided with a valve 43 of ordinary construction, and said cup is provided with a closely-fitting cover 14, through which it is supplied with oil. When desirous to fill the cup with oil when under pressure, the valve 43 is closed preparatory to filling the cup. The cup being filled, the cover 1 1 is replaced, when the valve 43 is opened, thus permitting the oil in the cup 12 to flow into the respective cylinders of the motor.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. in a portable device for polishing floors and similar surfaces, a truck comprising a pair of wheels and a wheel-connecting axle; a motor pivotally supported from said wheels upon said axle; a polishing-wheel pivotally suspended from the driving-shaft of said motor and means for adjusting said motor and polishingwheel vertically from said truck.

2. In a portable device for polishing floors and similar surfaces, a truck comprising a pair of wheels and a wheel-connecting axle; a motor pivotally supported from said wheels uponsaid axle; a polishing-wheel pivotally suspended from the driving-shaft of said motor; an operating-handle pivotally supported from said wheels upon the opposite side of said axle and means for adjusting said motor and polishingwheels vertically from said truck.

In testimony whereof I afiix my signature in the presence of two witnesses.

JOSEPH SHAVER. Witnesses:

JAs. B. ERWIN, LEVERETT C. WHEELER. 

